Spray the hell out of your undercarriage and wheel wells/suspension with a power washer.

My '99 Trans Am was subjected the exact same kind of fun when I was in high school. I thought I cleaned it up sufficiently afterwards but when I went to swap the springs with BMR Progressive springs, I sheared one of the bolts holding my front roll bar trying to get it off. The bolt had rusted to the point of failure. I was lucky it hadn't happened while I was driving.

Looks like good fun though. I love taking mine to open lots when it snows. I need to get a gopro and start recording again.